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"There is evidence consistent with reports that the baby hit the floor," Adams County Coroner Monica Broncucia-Jordan told 9Wants to Know Thursday after her office performed an autopsy Wednesday.

The baby's death was caused by complications of Trisomy 18 - a genetic disorder.

According to health experts, Trisomy 18 - also known as Edwards syndrome - is a genetic disorder in which a person has a third copy of material from chromosome 18, instead of the usual two copies. It is also called Trisomy E.

About 50 percent of infants with Trisomy 18 don't live longer than a week.

Broncucia-Jordan says it is the opinion of the coroner's office that complications of Trisomy 18 caused the death and not the fall after the autopsy revealed no evidence that the baby ever took a breath.

Babies born with Trisomy 18 are often unable to breathe, Broncucia-Jordan says. Also, the injury to the baby's brain did not occur in an area of the brain that controls respiratory function, she says. She says brain injuries, that are not major such as severe brain trauma suffered during a car crash, take time to affect a person and don't cause immediate death. Broncucia-Jordan also says there is little medical literature and expert opinion to suggest short distance falls cause infant deaths.

University of Colorado Hospital told 9Wants to Know Wednesday that it is investigating the incident and has not said the baby fell to floor as the baby's father, Martin Aguirre, claims.

"We recognize there's some dispute about the facts and order of events, and we hope to gain clarity from both our review and the coroner's review," University of Colorado Hospital said in a statement released Wednesday before the coroner released the cause of death.

"He hit the floor and slid under the bed," Aguirre told 9NEWS.

"That's all they said was push. The doctor was right there fixing the blue thing. As soon as she saw the head, she didn't know what to do. She grabbed it. It was coming out," Aguirre said. "And the baby just came out and... she didn't know what to do. She tried to grab him and he kept slipping out of her hands and he just slid off her hands from the side. My mom tried to catch her, but she couldn't because she was holding my girlfriend's leg and hand."